Update which python versions are supported

[ways]

What maintenance does this project need?

• Setup.py says 3.9-3.14
• Some github actions build for 3.9-3.12 and some up to 3.13
• Tox tests with these versions: py38, py37, py36, py35, pypy3

Tested tox for python 3.8:

> uv python install 3.8
> uv tool run --python 3.8 tox -e py38
...
py38: commands[0]> pytest -v --flakes --cache-clear --basetemp=/home/larsfp/src/eccodes-python/.tox/py38/tmp
/home/larsfp/src/eccodes-python/.tox/py38/lib/python3.8/site-packages/pep8.py:110: FutureWarning: Possible nested set at position 1
  EXTRANEOUS_WHITESPACE_REGEX = re.compile(r'[[({] | []}),;:]')
Traceback (most recent call last):
  File "/home/larsfp/src/eccodes-python/.tox/py38/bin/pytest", line 8, in <module>
    sys.exit(main())
  File "/home/larsfp/src/eccodes-python/.tox/py38/lib/python3.8/site-packages/_pytest/config/__init__.py", line 60, in main
    config = _prepareconfig(args, plugins)
  File "/home/larsfp/src/eccodes-python/.tox/py38/lib/python3.8/site-packages/_pytest/config/__init__.py", line 194, in _prepareconfig
    return pluginmanager.hook.pytest_cmdline_parse(
  File "/home/larsfp/src/eccodes-python/.tox/py38/lib/python3.8/site-packages/pluggy/hooks.py", line 289, in __call__
    return self._hookexec(self, self.get_hookimpls(), kwargs)
  File "/home/larsfp/src/eccodes-python/.tox/py38/lib/python3.8/site-packages/pluggy/manager.py", line 68, in _hookexec
    return self._inner_hookexec(hook, methods, kwargs)
  File "/home/larsfp/src/eccodes-python/.tox/py38/lib/python3.8/site-packages/pluggy/manager.py", line 59, in <lambda>
    self._inner_hookexec = lambda hook, methods, kwargs: hook.multicall(
  File "/home/larsfp/src/eccodes-python/.tox/py38/lib/python3.8/site-packages/pluggy/callers.py", line 203, in _multicall
    gen.send(outcome)
  File "/home/larsfp/src/eccodes-python/.tox/py38/lib/python3.8/site-packages/_pytest/helpconfig.py", line 93, in pytest_cmdline_parse
    config = outcome.get_result()
  File "/home/larsfp/src/eccodes-python/.tox/py38/lib/python3.8/site-packages/pluggy/callers.py", line 80, in get_result
    raise ex[1].with_traceback(ex[2])
  File "/home/larsfp/src/eccodes-python/.tox/py38/lib/python3.8/site-packages/pluggy/callers.py", line 187, in _multicall
    res = hook_impl.function(*args)
  File "/home/larsfp/src/eccodes-python/.tox/py38/lib/python3.8/site-packages/_pytest/config/__init__.py", line 654, in pytest_cmdline_parse
    self.parse(args)
  File "/home/larsfp/src/eccodes-python/.tox/py38/lib/python3.8/site-packages/_pytest/config/__init__.py", line 871, in parse
    self._preparse(args, addopts=addopts)
  File "/home/larsfp/src/eccodes-python/.tox/py38/lib/python3.8/site-packages/_pytest/config/__init__.py", line 816, in _preparse
    self.pluginmanager.load_setuptools_entrypoints("pytest11")
  File "/home/larsfp/src/eccodes-python/.tox/py38/lib/python3.8/site-packages/pluggy/manager.py", line 282, in load_setuptools_entrypoints
    self.register(plugin, name=ep.name)
  File "/home/larsfp/src/eccodes-python/.tox/py38/lib/python3.8/site-packages/_pytest/config/__init__.py", line 310, in register
    ret = super(PytestPluginManager, self).register(plugin, name)
  File "/home/larsfp/src/eccodes-python/.tox/py38/lib/python3.8/site-packages/pluggy/manager.py", line 102, in register
    hook._maybe_apply_history(hookimpl)
  File "/home/larsfp/src/eccodes-python/.tox/py38/lib/python3.8/site-packages/pluggy/hooks.py", line 336, in _maybe_apply_history
    res = self._hookexec(self, [method], kwargs)
  File "/home/larsfp/src/eccodes-python/.tox/py38/lib/python3.8/site-packages/pluggy/manager.py", line 68, in _hookexec
    return self._inner_hookexec(hook, methods, kwargs)
  File "/home/larsfp/src/eccodes-python/.tox/py38/lib/python3.8/site-packages/pluggy/manager.py", line 59, in <lambda>
    self._inner_hookexec = lambda hook, methods, kwargs: hook.multicall(
  File "/home/larsfp/src/eccodes-python/.tox/py38/lib/python3.8/site-packages/pluggy/callers.py", line 208, in _multicall
    return outcome.get_result()
  File "/home/larsfp/src/eccodes-python/.tox/py38/lib/python3.8/site-packages/pluggy/callers.py", line 80, in get_result
    raise ex[1].with_traceback(ex[2])
  File "/home/larsfp/src/eccodes-python/.tox/py38/lib/python3.8/site-packages/pluggy/callers.py", line 187, in _multicall
    res = hook_impl.function(*args)
  File "/home/larsfp/src/eccodes-python/.tox/py38/lib/python3.8/site-packages/setuptools/_vendor/typeguard/_pytest_plugin.py", line 53, in pytest_addoption
    add_ini_option("string")
  File "/home/larsfp/src/eccodes-python/.tox/py38/lib/python3.8/site-packages/setuptools/_vendor/typeguard/_pytest_plugin.py", line 22, in add_ini_option
    parser.addini(
  File "/home/larsfp/src/eccodes-python/.tox/py38/lib/python3.8/site-packages/_pytest/config/argparsing.py", line 130, in addini
    assert type in (None, "pathlist", "args", "linelist", "bool")
AssertionError
py38: exit 1 (0.21 seconds) /home/larsfp/src/eccodes-python> pytest -v --flakes --cache-clear --basetemp=/home/larsfp/src/eccodes-python/.tox/py38/tmp pid=2286013
  py38: FAIL code 1 (1.83=setup[1.62]+cmd[0.21] seconds)
  evaluation failed :( (1.88 seconds)

So which versions are actually supposed to be supported, and why are all the tox tests for very old pythons?

Organisation

No response